Chipless RFID Label with Identification and Touch-Sensing Capabilities.

Rahul Unnikrishnan,Olivier Rance,Etienne Perret,Nicolas Barbot

doi:10.3390/s21144862

Abstract

This article presents a 14-bit chipless RFID label which, in addition to classical identification feature, can be used as decimal numeric keypad, allowing the deployment of secure access control applications. A low-cost single layer label comprising 10 RF loop scatterers is used to code information in the frequency domain. In addition, each resonator is associated to a digit in the decimal number system, and the difference in the spectrum caused by the touch event is exploited for the detection of each key pressing. The shape of the resonators has been carefully selected to be both highly resonant and to show high sensitivity to the presence or absence of the human finger. The concept is validated by measurements in an office environment using an FCC compliant low-cost chipless reader and microstrip vivaldi antennas. Simple detection algorithms are proposed for both identification and touch sensing in real environment.

Highlights

Radio frequency identification (RFID) has come into picture as a serious contender to the conventional optical identification techniques because of the advantages, which is unique to the system by the usage of radio waves [1]
In the last few decades, serious research has been carried out around the globe to increase the performance of the system, including the reading distance or the cost of the tag, which is one of the primary parameters when it comes to the mass production of the system
Chipless RFID technology has come to life as a solution to overcome the hurdle of fabrication cost faced by conventional chipped RFID tags

Summary

Introduction

Chipless RFID technology has come to life as a solution to overcome the hurdle of fabrication cost faced by conventional chipped RFID tags This non-chip identification solution with its advantages, in terms of its operating principles, has attracted a lot of researchers around the globe. Thorough research has been conducted to find the effects of human body interaction on RFID devices [3] and the impact in the real-life scenario is studied [4,5,6,7]. In this context, it becomes of great interest to show that a

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Conclusion